Drawing-pen.



v PATENTBD JUNE 25, 1907.- W. B. PHILLIPS.

DRAWING PEN.

AYPLIOA'I ION FILED NOV- 12. 1908.

INVENTOR ATTORNEY WALTER B. PHILLIPS, OF KANSAS CITY, KANSAS.

DRAWING-PEN.

Specification of Letters Patent.

Patented June 25, 1907.

Application filed November 12, 1906. Serial No. 342,994.

To all whom it may concern:

Be it known that I, WALTER B. PHILLIPS, a citizen of the United States,residing at Kansas City, in the county of. Wyandotte and State ofKansas, have invented certain new and useful Improvements in Drawing-Pens, of which the following is a specification.

. This invention relates to improvements in drawing-pens, and appertainsmore particularly to an attachment whereby the blades of the pen may bequickly opened or closed Without changing the position of. the setscrewusually employed for accomplishing the above results.

A draftsman frequently has occasion, to cleanse the blades of his penand in order to ain access to the inner sides thereof must force themapart. This operation is usually accomplished through theinstrumentality of the set-screw above referred to, and considerabletime is consumed in turning said set-screw and in obtaining properadjustment of the blades before drawing can be resumed. By employing myattachment the greater portion of this time may be saved, as the bladescan be instantly forced apart or drawn together without adjusting thesetscrew.

In order that the invention may be fully understood reference will nowbe made to the accompanying drawing, in which Figure 1 shows a brokenside elevation of a drawing-pen provided with my attachment in itsoperative position. Fig.2 is a side elevation with the attachment in aninoperative position. Fig. 3 is a detailed side elevation of theattachment removed from the pen. Fig. 4 is a rear elevation thereof, andFig. 5 is a plan View of the same.

1 designates a drawing-pen of ordinary construction, comprising a handle2, a rigid blade 3, a resilient blade 4, and a set-screw 5 wherebyadjustment of the blades is effected.

6 designates my attachment, which is preferably stamped from one pieceof metal to reduce the cost of production. Said attachment is interposedbetween a shoulder 7 of the set-screw and blade 4, upon which it isslidably mounted.

The attachment comprises an inclined portion 8 having a longitudinalslot 9 the ends of which are adapted to contact with the setscrew andthus ward movement of the attachment, a portion 9 arranged substantiallyparallel with the pen, front and rear fingers 10, 11, re-

limit the backward and for spectively, slidably embracing the sides ofblade 4 to guide the attachment thereon, a bridge 12 slidably engagingthe upper surface of blade 4, and an upturned handle 13 at the rearthereof.

In practice the attachment is moved forward until portion 9 engagesshoulder 7, as shown in Fig. 1. Blade 4 is then adjusted as desired bythe set-screw 5. When it is desired to open the blades for the purposesof cleansing, inspecting, or grinding the same Without changing theposition of the setscrew 5, the attachment is slid backward to theposition shown in Fig. 2 by engaging the handle with the index finger.To close the blades without changing the position of the set-screw, itis only necessary to force the attachment forward to the position shownin Fig. 1, by pressing against the handle with the thumb. As theattachment is secured to the pen by means of set-screw 5, it maybereadily removed by taking out said setscrew.

- From the above description it is apparent that I have produced adevice which is simple in construction, may be produced at low cost, anddoes not require alterations in the construction, or additional work ofany kind upon the pen to apply orremove the attachment.

Having claim is:

1. The combination with a drawing-pen,

and a set-screw for adjusting the blades thus described my invention,what thereof, of an attachment slidably mounted upon the pen to securethe opening and closing of the blades and consisting of an inclinedsurface adapted to engage the set-screw, and a portion substantiallyparallel with the upper surface of the pen adapted to engage t eset-screw.

2. The combination with a l and a set screw for adjusting the bladesthereof, of an attachment slidably mounted upon the pen to secure theopening and closing of t, e blades and consisting of an inclined surfaceadapted to engage the set-screw, a portion substantially parallel withthe upper surface of the pen adapted to engage the setdrawing-pen,

screw, and guide members slidably engaging the pen.

3. The combination with a drawing-pen, and a set-screw for adjusting theblades thereof, of an attachment slidably mounted upon the penconsisting of an inclined surface adapted to engage the set-screw, aportion substantially parallel with the upper surface of the pen adaptedto engage the setscrew, and a bridge slidably mounted upon the upperblade.

5 4. The combination with a drawing-pen,

and a set-screw for adjusting the blades thereof, of-an attachmentslidably mounted upon the pen to secure the opening and closing of theblades and consisting of an inclined l0 surface adapted to engage theset-screw, a

portion substantially parallel with the upper surface of the pen adaptedto engage the setscrew, and a handle at the rear of the attachment.

In testimony whereof I a'lhx my signature I 5 in the presence of twowitnesses.

WALTER B. PHILLIPS. WVitnesses F. Gr. FISCHER, M. J. Cox.

